Bimetallic-organic-framework-based derived porous carbon/multi-wall carbon nanotube nano composite absorbing material and preparation method thereof

A technology of multi-wall carbon nanotubes and bimetallic nanometers, applied in the field of electromagnetic composite materials, to achieve the effects of wide frequency band, enhanced absorption capacity, and easy operation

Active Publication Date: 2018-11-16
ANHUI UNIV OF SCI & TECH
View PDF14 Cites 45 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the preparation of porous carbon / multi-walled carbon nanotube nanocomposite absorbing materials by combining bimetallic organic framework materials with multi-walled carbon nanotubes.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bimetallic-organic-framework-based derived porous carbon/multi-wall carbon nanotube nano composite absorbing material and preparation method thereof
  • Bimetallic-organic-framework-based derived porous carbon/multi-wall carbon nanotube nano composite absorbing material and preparation method thereof
  • Bimetallic-organic-framework-based derived porous carbon/multi-wall carbon nanotube nano composite absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Weigh 50mg MWCNTs, 1.74g Co(NO 3 ) 2 ·6H 2 O and 1.78g Zn(NO 3 ) 2 ·6H 2 O was sequentially added to methanol / absolute ethanol mixture. Stir vigorously for 30 minutes and then ultrasonically disperse for 30 minutes, alternately for 5 times, and control the stirring and ultrasonic time for 2.5 hours. The resulting mixture was labeled solution A.

[0029] 2. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Then 3.94 g of 2-methylimidazole was added and stirred vigorously for 20 min. The resulting mixture was labeled solution B.

[0030] 3. Quickly add solution B into solution A under the condition of vigorous stirring, stir vigorously for 20 minutes, and leave the mixed dispersion to age for 24 hours.

[0031] 4. After aging, wash repeatedly with absolute ethanol by centrifugation for several times, collect the precipitate, put it into a vacuum drying oven, ...

Embodiment 2

[0035] 1. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Weigh 25mg MWCNTs, 1.74g Co(NO 3 ) 2 ·6H 2 O and 1.78g Zn(NO 3 ) 2 ·6H 2 O was sequentially added to methanol / absolute ethanol mixture. Stir vigorously for 30 minutes and then ultrasonically disperse for 30 minutes, alternately for 5 times, and control the stirring and ultrasonic time for 2.5 hours. The resulting mixture was labeled solution A.

[0036] 2. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Then 3.94 g of 2-methylimidazole was added and stirred vigorously for 20 min. The resulting mixture was labeled solution B.

[0037] 3. Quickly add solution B into solution A under the condition of vigorous stirring, stir vigorously for 20 minutes, and leave the mixed dispersion to age for 24 hours.

[0038] 4. After aging, wash repeatedly with absolute ethanol by centrifugation for several times, collect the precipitate, put it into a vacuum drying oven, ...

Embodiment 3

[0042] 1. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Weigh 0mg MWCNTs, 1.74g Co(NO 3 ) 2 ·6H 2 O and 1.78g Zn(NO 3 ) 2 ·6H 2 O was sequentially added to methanol / absolute ethanol mixture. Stir vigorously for 30 minutes and then ultrasonically disperse for 30 minutes, alternately for 5 times, and control the stirring and ultrasonic time for 2.5 hours. The resulting mixture was labeled solution A.

[0043] 2. Take a 250mL beaker, add 40mL methanol and 40mL absolute ethanol, mix well. Then 3.94 g of 2-methylimidazole was added and stirred vigorously for 20 min. The resulting mixture was labeled solution B.

[0044] 3. Quickly add solution B into solution A under the condition of vigorous stirring, stir vigorously for 20 minutes, and leave the mixed dispersion to age for 24 hours.

[0045] 4. After aging, wash repeatedly with absolute ethanol by centrifugation for several times, collect the precipitate, put it into a vacuum drying oven, a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a bimetallic-organic-framework-based derived porous carbon / multi-wall carbon nanotube nano composite absorbing material and a preparation method thereof. On the basis of a hightemperature pyrolysis method, the porous carbon / multi-wall carbon nanotube nano composite material is prepared by using a multi-wall carbon nano tube as a carrier, cobaltous nitrate hexahydrate and zinc nitrate hexahydrate as metal salt precursors, 2-methylimidazole as an organic ligand, and methanol and ethanol as mixed solvents. The preparation method has good green and environment-friendly effects; no hazardous by products are generated; and the preparation process is simple. The prepared nano composite material has advantages of high electromagnetic wave absorption capacity, large absorption frequency bandwidth and low density. Electromagnetic wave with different wavebands can be absorbed effectively by adjusting the additive amount of the multi-wall carbon nano tube and the coating thickness. The bimetallic-organic-framework-based derived porous carbon / multi-wall carbon nanotube nano composite absorbing material and the preparation method thereof have the great application valuein the electromagnetic absorption and electromagnetic shielding fields.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic composite materials, and in particular relates to a method for preparing a bimetallic organic framework derived porous carbon / multi-wall carbon nanotube nanocomposite wave-absorbing material. Background technique [0002] With the development of electromagnetic stealth technology in the military field and the increasingly serious problems of electromagnetic interference and electromagnetic pollution, electromagnetic wave absorbing materials have gradually become a research hotspot in the field of functional materials. Electromagnetic wave absorbing material refers to a class of materials that can absorb and attenuate incident electromagnetic waves, convert electromagnetic energy into heat or other forms of energy and dissipate it, or make electromagnetic waves disappear due to interference. Traditional electromagnetic wave absorbing materials, such as ferrite, metal micropowder and silicon...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00C01B32/168C01B32/05B82Y30/00C08G83/00
CPCB82Y30/00C01B32/05C01B32/168C08G83/008H05K9/0081
Inventor 疏瑞文李为杰张佳宾吴越孙瑞瑞陈雅南谢艳
Owner ANHUI UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap